Question 19 (1 point) If someone shrugs their shoulders, such as in the gesture

Question

Question 19 (1 point)

If someone shrugs their shoulders, such as in the gesture “I don’t know,” they are probably using this type of muscle:

SELECT ANY ACCURATE ANSWERS.

Question 19 options:

Supinator

Levator

Abductor

Depressor

Pronator

Save

Question 20 (1 point)

The "hamstring" is actually a group of muscles, which include:

SELECT ANY ACCURATE ANSWERS.

Question 20 options:

vastus medialis

vastus intermedius

popliteus

vastus lateralis

biceps femoris

Save

Question 21 (1 point)

A neuron has initiated one action potential. Before it can generate a second impulse:

SELECT ANY ACCURATE ANSWERS

Question 21 options:

Na ions must be pumped out of a cell, thereby reestablishing membrane potential

All proteins involved in action potentials must be resynthesized (newly synthesized)

Voltage gated Na channels must open to reestablish the membrane potential

The membrane potential must be +30mV before the cell is ready to generate a new action potential

answer not listed

K ions must be pumped out of a cell, thereby reestablishing membrane potential

Save

Question 22 (1 point)

Consider a resting cell is normally -70mV, what term is used to describe this cell if the voltage is -75mV?

SELECT ONE ANSWER.

Question 22 options:

slightly depolarized

can not determine based on information given

fully depolarized

hyperpolarized

repolarized

Save

Question 23 (1 point)

What term is used to describe the period after stimulation in which a neuron is insensitive to further stimulation?

SELECT ONE ANSWER

Question 23 options:

answer not listed

action potential

repolarization

depolarization

resting period

absolute refractory period

Save

Question 24 (1 point)

One of the following ion channels are perhaps the most important in generating and conducting an action potential.

This type of channel can open and close based on membrane potential. At rest the channel is closed and it opens at threshold.

Based on the information above, the channel is probably a(n):

SELECT ANY ACCURATE ANSWERS

Question 24 options:

Ligand gated channel

Voltage gated channel

Leakage channel (i.e. 'leaky channel')

Sodium channel

Mechanically gated channel

answer not listed

Supinator

Levator

Abductor

Depressor

Pronator

Explanation / Answer

20. Biceps femoris (explanation - The group of muscles forming hamstring are located at the back of the thigh. It is formed of 3 individual muscles. They are biceps femoris, semitendinosus and rectus femoris.)

23. absolute refractory period (explanation - The absolute refractory period is the time a cell takes to get ready for a second stimulus after it returned to its resting state following an excitation.)

24. voltage gated channel (explanation - Changes in the electrical membrane potential near the channel activate this kind of channels.)

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.