Description : The following points about microfilaments are true except (A) They form cytoskeleton with microtubules (B) They provide support and shape (C) They form intracellular conducting channels (D) They are involved in muscle cell contraction
Last Answer : C
Description : Which of the following statement(s) is/are true concerning wound contraction? a. Wound contraction accounts for similar rates of reduction of wound size regardless of their location b. The fibroblast ... d. Actin microfillaments are found in fibroblasts and may play a role in wound contracture
Last Answer : Answer: b, c, d Wound contraction is an important event which contrasts healing open wounds and closed incisions. When open wounds contract, the surrounding skin is pulled over the open wound ... number in contracting wounds and are felt to play an active role in the process of wound contraction
Description : Leukotrienes: 1) Are formed from the cyclooxygenase pathway 2) Are synthesized by fibroblasts 3) Decrease vascular permeability 4) Leukotriene D4 has been identified as SRS-A which causes bronchial wall smooth muscle relaxation 5) Stimulate mucus secretion
Last Answer : Answers-5 Leukotrienes are synthesized by leucocytes.They are mediators of allergic reaction. They increase vascular permeability and attract neutrophils and eosinophils to inflammatory sites. ... stimulate mucus production, an important consideration in the pathophysiology of bronchial asthma.
Description : Which of the following statements regarding fibroblasts and their function in wound healing are true? a. IL-1 has both inhibitory and promotional effects on fibroblast growth b. TNFa ... EGF (epithelial growth factor) has been demonstrated to accelerate epidermal regeneration in cutaneous wounds
Last Answer : Answer: a, d IL-1 appears to be important in the process of normal wound repair. IL-1 has been shown to stimulate skin fibroblast and keratinocyte growth, as well as ... that recombinant EGF enhances keratinocyte migration. EGF is also a potent chemoattractant for granulation tissue fibroblasts
Description : Which of the following is/are true of the actions of transforming growth factor beta (TGF-b) during wound repair? A. Increased matrix and proteoglycan synthesis. B. Inhibition of proteases. ... of plasminogen inhibitor. D. Chemotaxis for fibroblasts and macrophages. E. Autoinduction of TGF-b.
Last Answer : Answer: ABDE DISCUSSION: Through autocrine and paracrine mechanisms TGF-b stimulates the deposition of collagen and other matrix components by fibroblasts, inhibits proteases, blocks plasminogen inhibitor, ... effects. The sustained production of TGF-b at the wound site leads to tissue fibrosis
Description : What are some examples of movement created by the contraction of sarcomeres of the muscle cells ?
Last Answer : The handling of a cup of coffee, the peristaltic movements of the bowels, the cardiac beats and even a smile are examples of movement created by contraction of the sarcomeres of the muscle cells. This contraction is a type of cell movement.
Description : Consider the following statements: 1. Cross bridges can cause muscle contraction. 2. They are able to oscillate back and forth and hook up with active sites on actin filaments 3. The bridges enable the thin filaments to pull the thick filaments by a ... (a) 1, 2 (b) 2, 3 (c) 1, 2, 4 (d) 1, 2, 3, 4
Last Answer : Ans:(c)
Description : In heart cells, which of the following serves as a secondary messenger, speeding up muscle cell contraction in response to adrenaline ?
Last Answer : In heart cells, which of the following serves as a secondary messenger, speeding up muscle cell contraction in ... A. cAMP B. cGMP C. GTP D. ATP
Description : "Sodium Pump" operates in - (1) Muscle contraction (2) Heart beat (3) Nerve impulse (4) None of the above
Last Answer : (3) Nerve impulse Explanation: Na+/K+-ATPase (also known as sodium-potassium pump) is an enzyme located in the plasma them brane of virtually every human cell and is common to all cellular ... are voltagegated, which means that they can open and close depending on the voltage across the membrane.
Description : The four sketches (A, B, C and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its ... Smooth Heart Heart muscle contraction tissue (d) (A) Columnar Nephron Secretion epithelium and absorption
Last Answer : (a) (B) Glandular Intestine Secretion epithelium
Description : if you suspect atrial flutter : Consider digoxin if not already in use because it frequently increases the conduction ratio and decreases the ventricular rate. , Avoid adrenergic and ... to the muscle decrease blood supply to the muscle the heart trying to beat fast ______________________________
Last Answer : decrease O2 supply to the muscle
Description : “Sodium Pump” operates in (1) Muscle contraction (2) Heart beat (3) Nerve impulse (4) None of the above
Last Answer : Nerve impulse
Description : Which of the following types of cells have a latent ability to regenerate? a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the ... a type of labile cell that multiply constantly to replace cells worn out by normal physiologic processes.
Last Answer : a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the kidney, liver, and pancreas, among other body organs.
Description : Histamine (a) May be released from mast cells by a number of therapeutic agents (b) Causes sedation (c) Decreases the force of contraction of ventricular muscle (d) Can cause strong contractions of the gravid human uterus
Last Answer : Ans: D
Description : Do anti aging supplements assist in building muscle when bodybuilding?
Last Answer : Supplements for the bodybuilder as well as those that address anti aging both have varying amount of the human growth hormones. So to answer your question anti aging supplements would play a factor ... your bodybuilding but the actual impact would depend on how much HGH is in the supplement.
Description : The relaxation techniques of progressive muscle relaxation, relaxation with guided imagery, and the Benson Relaxation Response share which of the following elements? a) A mental device (something on which ... required to assist an individual to learn techniques to reduce one's response to stress.
Last Answer : a) A mental device (something on which to focus the attention) Similar elements also include a quiet environment, a comfortable position, and a passive attitude.
Description : When were microfilaments discovered? -Biology
Last Answer : answer:
Description : Difference between microfilaments and intermediate filaments? -Biology
Description : Microtubules and microfilaments are made from proteins that are shaped like?
Last Answer : Microtubules 50nm, make up the larger part of the cytoskeleton,and they are hollow, and larger. Microfilaments 8-10 nm aresmaller, they are in a double helix shape, different frommicrotubules.
Description : A mouse cell is treated with a chemical that interferes with the activity of microfilaments. Which of the following will probably be affected the most
Last Answer : A mouse cell is treated with a chemical that interferes with the activity of ... Chromosome duplication D. Pairing of homologous chrmosomes
Description : Which one is apparato reticolare? (a) Golgi apparatus (b) Endoplasmic reticulum (c) Microfilaments (d) Microtubules
Last Answer : (a) Golgi apparatus
Description : The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as (a) microtubules (b) microfilaments (c) intermediate filaments (d) lamins.
Last Answer : (b) microfilaments
Description : Endoskeleton of a cell is made up of (A) Microtubules (B) Microfilaments (C) Intermediate filaments (D) All of these
Last Answer : (D) All of these
Description : The microfilaments composed of (A) Actin protein (B) Gelatin protein (C) Keratin protein (D) Tubulin protein
Last Answer : (A) Actin protein
Description : The purpose of a trim tab is: a. To assist the pilot in initiating movement of the controls b. To zero the load on the pilot controls in the flight attitude required c. To provide feel to the controls at high speed d. To increase the effectiveness of the controls
Last Answer : b. To zero the load on the pilot controls in the flight attitude required
Description : What is the difference between Myelinated and Non-myelinated axons? -Biology
Description : What is the difference between Dendrites and Axons? -Biology
Last Answer : 1 neuron has 1 action.
Description : What Axons from ganglion cells make up?
Last Answer : Feel Free to Answer
Description : Which of the following statement(s) describe the effects of aging on wound healing? a. A finer, more cosmetic scar might be expected b. In vitro studies demonstrate decreased proliferative ... . Wound infection occurs more frequently in elderly patients due to diminished ability to fight infection
Last Answer : Answer: a, b, c There are important age-dependent aspects of wound healing. The elderly heal more slowly and with less scarring. There is a gradual attenuation of the inflammatory ... the sutures. There is no evidence to suggest that wound infections occur more commonly in elderly patients
Description : Which of the following is/are true concerning wound fibroblasts? A. Fibroblasts synthesize and secrete collagen molecules. B. Wound fibroblasts are derived from blood-borne precursor cells. C. ... clot can act as a physical barrier to fibroblast penetration, which delays normal wound healing.
Last Answer : Answer: ACD DISCUSSION: Fibroblasts appear in the wound on about the third day of healing and begin to synthesize and secrete collagen molecules. Wound fibroblasts arrive from cells surrounding ... enzymes, and large amounts of fibrin and blood clot prevent fibroblasts from entering the wound
Description : The white matter present in the brain and spinal cord consists of (a) neuroglia (b) myline sheath (c) terminal arborizations of axons (d) cellular sheath of Schwann
Last Answer : Ans:(b)
Description : What are the fatty covering of some axons called?
Last Answer : Myelin sheath
Description : The function of fibroblasts is to
Last Answer : secrete and maintain fibres.
Description : A granuloma is C A. a small nodule of granulation tissue B. a tumour composed of granulocytes C. composed primarily of epithelioid cell, fibroblasts and lymphocytes D. None of these
Last Answer : composed primarily of epithelioid cell, fibroblasts and lymphocytes
Description : Tissue macrophages are derived from which one of the following? A. Resident activated fibroblasts B. Activated B lymphocytes C. Circulating monocytes D. Platelets
Last Answer : Platelets
Description : Early granulation tissue is BEST characterized by the presence of: C A. Plasma cells and macrophages B. T lymphocytes and eosinophils C. Capillary buds and fibroblasts D. None of these
Last Answer : Capillary buds and fibroblast
Description : Which one of the following are cardinal features of granulation tissue? C A. Abundant collagen B. Proliferating macrophages and lymphocytes C. Proliferating capillaries and fibroblasts D. None of these
Last Answer : Proliferating capillaries and fibroblasts
Description : A metastatic cancerous tumour is termed ‘sarcoma’ if the disorder is in (a) fibroblasts (b) circulatory system (c) immune system (d) epithelial cells.
Last Answer : (a) fibroblasts
Description : Cortisol: a. increases the circulating lymphocytes b. increases the circulating eosinophils c. decreases the production of prostaglandins d. inhibits the production of fibroblasts
Last Answer : inhibits the production of fibroblasts
Description : The axons of the Purkinje cells in the cerebellar cortex: a. terminate in excitatory synapses b. terminate in cerebellar nuclei c. terminate in the spinal cord. d. form the main efferent pathway from the cerebellar cortex
Last Answer : terminate in cerebellar nuclei
Description : In the neurones: a. the axons convey impulse away from the cell body b. neurotransmitters are synthesized in the cell bodies and then transported to the axons c. the condition ... with fibre diameter d. the excitability is increased if the extracellular calcium concentration is decreased
Last Answer : the axons convey impulse away from the cell body
Description : With regard to interferons: a. they are produced by B lymphocytes b. IFN-gamma is produced by cells infected with virus c. IFN-gamma increases MCH class I and II expression in antigen presenting cell d. IFN-gamma is produced by fibroblasts
Last Answer : IFN-gamma is produced by cells infected with virus
Description : Which of the following is regarded as a unit of nervous tissue? (a) Neurons (b) Myelin sheath (c) Axons (d) Dendrites
Last Answer : (a) Neurons
Description : Receptor sites for neurotransmitters are present on (a) pre-synaptic membrane (b) tips of axons (c) post-synaptic membrane (d) membranes of synaptic vesicles.
Last Answer : (c) post-synaptic membrane
Description : In mammals, histamine is secreted by (a) lymphocytes (b) mast cells (c) fibroblasts (d) histiocytes.
Last Answer : b) mast cells
Description : Mumps vaccine is prepared from the cultures of A.chick fibroblasts B.African green monkey cells C.healthy calves D.sheep
Last Answer : A.chick fibroblasts
Description : Write down the role of axons?
Last Answer : Axons are organelles that carry information away from the cell body. Axons may be as small as several microns or as long as several meters in giraffes and whales. The axons main job is to send a ... only one axon, but the axon may have branches with what are called terminal buttons at its end.