9) Which of the following is most likely to produce an action potent B) inhibito
ID: 3519936 • Letter: 9
Question
9) Which of the following is most likely to produce an action potent B) inhibitory postsynaptic potential (uPSP postsynaptic potential (EPSP) )opening of potassium ion channels accomplished by the power stroke during musdle cell contratiosnt A) The 10) power stroke cocks the myosin head into its high-energ) power stroke results in myosin heads pulling actin B) The sarcomere. toward the center of the D) The power stroke causes the myosin and actin filaments to 11) What would most likely lead to an IPSP? A) opening of calcium ion channels C) opening of potassium ion channels B) closure of chloride ion channels D) opening of sodium ion channels 12) 12) The Na/K pump helps a muscde cell mainain a state o A) action potential. C) resting membrane potential. B) depolarization. D) propagation. 13) What is responsible for keeping blood vessels partialy constrited at all times? A) cerebral cortex control C) sympathetic tone 8) parasympathetic tone D) somatic control 14) 14) Which of the following movements is an example of abduction? A) turning the palm of the hand upward B) spreading the fingers apart C) moving the hand toward the shoulder D) extreme bending of the head backwards 15) What type of neuron is found within the CNS to perform thejob of information processing? B) motor (efferent) neurons D) sensory (afferent) neurons r neurons C) int 16) 16) What channels open or close in response to physical distortion of the membrane ated D) ligand-gated C) voltage-gated 17) 17) Where is antidiuretic hormone (ADIHL or vasopressin) made? B) anterior pituitary D) posterior pituitary A) thyroid gland C) hypothalamus 18) B) biaxial joints. D) hinge joints 18) The shoulder and hip joints are similar because they are both A) uniaxial joints C) ball-and-socket joints C) muscle D) nervous 19) tybinds support and protects he budy B) epithelial 19) What generail ksue type bindhs surhons
Explanation / Answer
9) The correct option is C. Excitatory Postsynaptic potential (EPSP).
An excitatory postsynaptic potential (EPSP) is a postsynaptic potential, which forms the postsynaptic neuron more likely to fire an action potential.
10) The correct option is B. The power stroke results in myosin heads pulling actin towards the center of the sarcomere.
The phosphate generated in the previous contraction cycle is released during the power stroke. This results in the myosin heads pulling towards the center of the sarcomere.
11) The correct option is C. opening of potassium ion channels.
Opening of potassium ion channels would most likely lead to an IPSP. The open channels are selectively permeable to chloride or potassium ions, which permit these ions to pass through the membrane.
12) The correct option is C. resting membrane potential.
Na+ - K+ pump fueled by ATP in presence of ATP are enable movement of 3 Na+ in and 2 K+ out followed by increased calcium inside muscle cells to improve contractility.
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