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Blood clotting is an example of positive feedback since the action of the effector amplifies that of the stimulus.

T

____________ and ____________ are often regulators of effectors in most feedback loops.

Hormones; nerves

An integrating center of a negative feedback loop has the function of analyzing information from many different sensors about deviations from a set point and then altering the activity of particular effectors to compensate for the deviation.

T

An integrating center sends information to a(n)

Effector

The osmotic pressure of a solution is directly related to its ___________ concentration.

Solute

Carrier proteins function in

Both A and B are correct

Hydrophobic molecules usually enter a cell via ____________.

Diffusion

Glucose entry into the cell is by facilitated diffusion.

True

Endocrine glands secrete _____.

Hormones

The Na+/K+ pump creates a ____________ charge inside the cell.

Negative

Diffusion is more rapid in cells with microvilli compared to cells lacking microvilli

True

Simple diffusion may involve all of the following except

carrier proteins

Homeostasis is maintained using _____.

Both A and B are correct

A decrease in mean arterial pressure is detected by

A sensor

Diffusion is more rapid in cells with microvilli compared to cells lacking microvilli.

T

Passive transport of water is known as

Osmosis

Cells placed in hypotonic solutions will

Increase in volume

Active transport proteins are often regulated by phosphorylation.

T

The rate of diffusion is influenced by

All of these choices are correct

The movement of glucose across the plasma membrane occurs via _____.

facilitated diffusion

Ion channels that can be opened by physiological stimuli are said to be

Gated

Fixed phagocyte cells do not

exhibit amoeboid movement.

An integrating center sends information to a(n)

Effector

Blood clotting is an example of positive feedback since the action of the effector amplifies that of the stimulus.

T

When an internal condition deviates from its _____, a negative feedback loop is activated.

set point

Hyperkalemia would ____________ the resting membrane potential of the cell.

Decrease

Cells placed in hypotonic solutions will

Increase in volume

The charge difference across a membrane produces the membrane potential

T

Passive transport across a plasma membrane may be accomplished with the aid of specific carrier proteins.

T

Facilitated diffusion and active transport differ with regard to the direction of solute movement relative to the concentration gradient.

T

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