The plasma membrane is referred to as a mosaic because of the presence of ________.

stationary proteins in a uniform arrangement
carbohydrates in changing patterns
phospholipids that are in constant motion
moving proteins in a random arrangement


moving proteins in a random arrangement

Anatomy & Physiology

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The C cells of the thyroid gland produce

A) only calcitonin. B) only TSH. C) only parathyroid hormone. D) only thyroxine. E) thryoxine and TSH.

Anatomy & Physiology

The space between two neurons is called the ________.

A. synapse B. terminal button C. vesicle D. soma

Anatomy & Physiology

Each of the following is an example of homeostasis except one. Identify the exception.

A) A rise in blood calcium levels triggers the release of a hormone that lowers blood calcium levels. B) Increased pressure in the aorta triggers mechanisms to lower blood pressure. C) A decrease in body temperature triggers a neural response that initiates physiological changes to increase body temperature. D) A rise in estrogen during the menstrual cycle increases the number of progesterone receptors in the uterus. E) Increased blood sugar stimulates the release of a hormone from the pancreas that stimulates the liver to store blood sugar.

Anatomy & Physiology

In the case of blood types, both alleles A and B may be expressed as the phenotype. This exemplifies:

A) polygenic inheritance. B) incomplete dominance. C) codominance. D) sex-linked inheritance.

Anatomy & Physiology