The frequency at which a single neuron can “fire” action potentials is limited b

Question

The frequency at which a single neuron can “fire” action potentials is limited by the _____________________________.

refractory period for the neuron’s Na+ channels.

number of other cells that the neuron contacts.

length of the axon of the neuron.

number of dendrites on the neuron.

number of synapses that the neuron forms

On a hot day, an active dog will pant heavily and visit his water bowl frequently. Which of the following statements about the dog’s condition or behavior is false?

He is sending more blood to his skin.

He is at the upper end of the thermoneutral zone.

He is using evaporative cooling to lower core body temperature.

He is operating at a basal metabolic rate.

QUESTION 4

There is an upper limit in terms of temperature within the cells that the human life is compatible with. This upper limit in temperature is important because ____________________.

it can regulate sweating.

when it is reached, it promotes the utilization of fat compared to glucose for the production of energy.

it determines whether proteins/enzymes are intact and functional within the cells.

when it is reached, it increases protein utilization for the production of energy.

it can keep the cells warm.

Responses associated with positive feedback _____________________________.

enhance the response that currently takes place.

have long-term effects on the body.

will alter the set point.

are more common than negative feedback responses.

can increase or decrease the error relative to the set point.

refractory period for the neuron’s Na+ channels.

number of other cells that the neuron contacts.

length of the axon of the neuron.

number of dendrites on the neuron.

number of synapses that the neuron forms

Explanation / Answer

Question: The frequency at which a single neuron can “fire” action potentials is limited by the _____________________________

Ans.   refractory period for the neuron’s Na+ channels.

Question: On a hot day, an active dog will pant heavily and visit his water bowl frequently. Which of the following statements about the dog’s condition or behavior is false

Ans. He is operating at a basal metabolic rate.

Question 4 : There is an upper limit in terms of temperature within the cells that the human life is compatible with. This upper limit in temperature is important because ____________________

Ans.

it can regulate sweating.

Question:- Responses associated with positive feedback _________________

Ans. enhance the response that currently takes place.

it can regulate sweating.

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