Description : The mechanism by which neostigmine improves contraction of myasthenic muscle involves: A. Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B. Diffusion of ... Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above
Last Answer : D. All of the above
Description : The neurotransmitter agent that is normally released in the sinoatrial node of the heart in response to a blood pressure increase is (a) Acetylcholine (b) Dopamine (c) Epinephrine (d) Glutamate (e) Norepinephrine
Last Answer : Ans: A
Description : Acetylcholine is a neurotransmitter at: a. sweat glands b. the adrenal medulla c. parasympathetic ganglia d. all above
Last Answer : all above
Description : With regard to the autonomic nervous system: a. the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves b. the preganglionic sympathetic fibres ... the ganglia of both sympathetic and parasympathetic nervous system d. botulin toxin blocks acetylcholine receptors
Last Answer : the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves
Description : Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter (a) acetylcholine (b) norepinephrine (c) dopamine (d) GABA.
Last Answer : c) dopamine
Description : Which one of the following does not act as a neurotransmitter? (a) Cortisone (b) Acetylcholine (c) Epinephrine (d) Norepinephrine
Last Answer : (a) Cortisone
Description : Which of the following terms refers to muscle tension being unchanged with muscle shortening and joint motion? a) Isotonic contraction Exercises such as swimming and bicycling are isotonic. b) ... , joint, or both. d) Fasciculation Fasciculation refers to involuntary twitch of muscle fibers.
Last Answer : a) Isotonic contraction Exercises such as swimming and bicycling are isotonic.
Description : The sodium/potassium pump is primarily responsible for the: a) resting potential b) action potential c) excretion of salts d) contraction of muscle fibers
Last Answer : ANSWER: A -- RESTING POTENTIAL
Description : The transport of proteins out of the cell is termed exocytosis. Which of the following statement(s) is/are true concerning this process? a. Secretory vesicles fuse with the plasma membrane b. ... or a neurotransmitter d. A decrease in cytoplasmic calcium occurs as part of the secretion process
Last Answer : Answer: a, b, c Transport vesicles that bud off the Golgi network carry both material to be secreted from the cell and protein destined to become components of the plasma ... but may also involve generation of diacylglycerol or production of cyclic AMP which activate kinases or phosphatases
Description : Which one of the following can be blocked by atropine? (a) Decreased blood pressure caused by hexamethonium (b) Increased blood pressure caused by nicotine (c) Increased skeleton muscle ... by neostigmine (d) Tachycardia caused by exercise (e) Tachycardia caused by infusion of acetylcholine
Last Answer : Ans: E
Description : The muscle fatigue occurs due to the release of (a) acetylcholine (b) lactic acid (c) adrenaline (d) none of these
Last Answer : Ans:(b)
Description : Dantrolene sodium reduces skeletal muscle tone by: A. Reducing acetylcholine release from motor nerve endings B. Suppressing spinal polysynaptic reflexes C. Inhibiting the generation of muscle action potential D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre
Last Answer : D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre
Description : What are the muscle fibers of a plasma membrane called?
Last Answer : endomysium
Description : What motor neuron and all the muscle fibers it innervates called?
Last Answer : the motor unit
Description : From the internal surface to the external surface, the digestive tube wall is made of mucosa (epithelial tissue responsible for the intestinal absorption), submucosa (connective tissue beneath the ... within the abdominal cavity. Digestion System - Image Diversity: histology of the digestive tube
Last Answer : What is the location of the salivary glands in humans?
Description : Paresthesia is the term used to refer to a) abnormal sensations. Abnormal sensations, such as burning, tingling, and numbness, are referred to as paresthesias. b) absence of muscle movement suggesting ... fasciculation. d) absence of muscle tone. A muscle which holds no tone is termed flaccid.
Last Answer : a) abnormal sensations. Abnormal sensations, such as burning, tingling, and numbness, are referred to as paresthesias.
Description : According to the sliding - filament model of muscle contraction, the molecules that moves to shorten a muscle are :-
Last Answer : According to the sliding - filament model of muscle contraction, the molecules that moves to shorten ... B. Collagen C. Myosin D. Creatine phosphate
Description : During contraction and relaxation of striated muscle fibre the length of A band usually :-
Last Answer : During contraction and relaxation of striated muscle fibre the length of A band usually :- A. ... . Increases C. Decreases D. Decreases too much
Description : During muscle contraction (a)____ energy is converted into (b)____ energy
Last Answer : During muscle contraction (a)____ energy is converted into (b)____ energy
Description : Contraction of a muscle is caused by
Last Answer : Contraction of a muscle is caused by
Description : Muscle contraction is initiated by a signal sent by the _____
Last Answer : Muscle contraction is initiated by a signal sent by the _____
Description : The main source of energy during muscle contraction is____
Last Answer : The main source of energy during muscle contraction is____
Description : Mechanism of muscle contraction is best explained by____
Last Answer : Mechanism of muscle contraction is best explained by____
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 : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : The threshold stimulus is the minimum stimulus r
Last Answer : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : ... D. If both Assertion and Reason are false.
Description : The following diagram (Figure 20, 35) describes the muscle contraction . Identify A to D
Last Answer : The following diagram (Figure 20, 35) describes the muscle contraction . Identify A to D A. ... Actin filament, C-Silding/Rotation , D-Cross bridge,
Description : ATP provides energy of muscle contraction by allowing for
Last Answer : ATP provides energy of muscle contraction by allowing for A. Cross-bridge attachment of myosin to ... Release of `Ca^(+)` from sarcoplasmic reticulum
Description : Immediate source of energy for muscle contraction is
Last Answer : Immediate source of energy for muscle contraction is A. Glucose B. GTP C. Creatine phosphate D. ATP
Description : Basic unit of muscle contraction is
Last Answer : Basic unit of muscle contraction is A. Actin B. Myosin C. Sarcomere D. Tropomyosin
Description : Chemical ions responsible for muscle contraction are
Last Answer : Chemical ions responsible for muscle contraction are A. `Ca^(++) and K^(+)` B. `Na^(+) and K^(+)` C. `Na^(+ ... ^(++)` D. `Ca^(++) and Mg^(++) ions `
Description : The contraction of muscle of shortest duration is seen in
Last Answer : The contraction of muscle of shortest duration is seen in A. Jaws B. Eyelids C. Heart D. Intestine
Description : The lactic acid generated during muscle contraction us flnally converted to glycogen in
Last Answer : The lactic acid generated during muscle contraction us flnally converted to glycogen in A. Muscle B. Kidney C. Liver D. Pancreas
Description : According to sliding filament theory of muscle contraction, the filament that move to shorten a muscle are
Last Answer : According to sliding filament theory of muscle contraction, the filament that move to shorten a muscle ... B. Actin C. Collagen D. Creatine phosphate
Description : When a muscle is stretched by a contraction of the opposing muscles it is called .?
Last Answer : if you're on OdysseyWare your answer would beActive stretching.............. =)
Description : What is Involuntary muscle contraction in an artery?
Last Answer : What is the answer ?
Description : Can you control the contraction of skeletal muscle?
Last Answer : Need answer
Description : What is needed besides calcium for muscle contraction?
Description : Which of the following property of prostaglandins has been utilized by chinicians in hospital for (A) Inducing fever (B) Causing inflammation (C) Effecting smooth muscle contraction (D) Disaggregation of spermatozoa
Last Answer : Answer : C
Description : The hormone required for uterine muscle contraction for child birth is (A) Progesterone (B) Estrogen (C) Oxytocin (D) Vasopressin
Description : What are the functions of potassium? (A) In muscle contraction (B) Cell membrane function (C) Enzyme action (D) All of these
Last Answer : Answer : D
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 : 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 : In gastrointestinal tract, serotonin causes (a) Contraction of gastrointestinal muscles (b) Decreased muscle tone (c) Decreased peristalsis (d) All of the above
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 : One of the following statements about muscular responses is not true. Choose that one (a) A muscle fibre contracts in all-or-none fashion (b) There is a slight latent period that occurs between when ... contraction (d) When a person is fully at rest, none of the muscles are contracting in the body
Last Answer : Ans:(d)
Description : Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) ... tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate
Last Answer : Ans:(a)
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 : "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 following are true: a. Kirschman's law: the greatest contrast in colour is seen when the luminosity differnece is small b. Emmbert's law: the perceived size of an object varies in ... image in the periphery of the retina tends to fade or disappear during steady fixation of another objec
Last Answer : Troxler's phenomenon: an image in the periphery of the retina tends to fade or disappear during steady fixation of another objec