Countercurrent Exchange Is Evident in

question 72

Multiple Choice

Countercurrent exchange is evident in

• A) the flow of water across the gills of a fish and that of blood within those gills.
• B) the flow of blood in the dorsal vessel of an insect and that of air within its tracheae.
• C) the flow of air within the primary bronchi of a human and that of blood within the pulmonary veins.
• D) the flow of water across the skin of a frog and that of blood within the ventricle of its heart.
• E) the flow of fluid out of the arterial end of a capillary and that of fluid back into the venous end of the same capillary.

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Definitions:

Adrenal Gland

The adrenal glands are small, triangular-shaped glands located above the kidneys that produce hormones such as cortisol and adrenaline, involved in stress response and metabolic processes.

Pituitary Gland

A small, pea-sized gland at the base of the brain that produces hormones influencing various body functions, including growth, metabolism, and reproductive processes.

Autonomic Nervous System

A component of the peripheral nervous system responsible for regulating automatic bodily activities such as cardiac rhythm, digestive processes, and breathing rate.

Piloerection

The involuntary erection of hairs on the skin, typically as a response to cold or fear, creating what is commonly known as "goosebumps."