Exam 4: From Cells to Organ Systems

The presence of a suntan is due to increased activity of ________ in response to increased levels of ultraviolet radiation.

In which one of the following locations would one expect to find cartilage?

A gland located in the dermis of the skin that helps to regulate body temperature is the ________ gland, which is a type of ________ gland.

Which one of the following types of tissues surrounds hollow organs that change shape or size regularly?

Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secreted by the thyroid gland and sets into motion responses to lower the blood calcium back to the set point. If the blood calcium level falls below a set point, the parathyroid gland secretes parathyroid hormone that sets into motion responses to raise the blood calcium. These homeostatic responses are examples of

________ is an abundant protein found in dense connective tissue (tendons and ligaments) and in cartilage.

A student is describing the tissue that makes up the walls of the alveoli in the lungs. It appears that these walls are composed of flattened cells arranged in a single layer to facilitate gas exchange. Which one of the following terms best describes this tissue?

Connective tissue cells that produce collagen, elastic, and reticular fibers are the ________.

A supportive noncellular proteinaceous layer underneath epithelial tissue is the ________ membrane.

An epithelium consisting of multiple layers of flat cells is classified as a(n) ________ epithelium.

Using the figure above, identify the type of cell junction used in each of the following. -These junctions join cardiac cells, allowing transfer of ions and water between cells.

The type of tissue that makes up the sweat glands, salivary glands, and endocrine glands is ________.

Control systems most likely involved in maintaining homeostasis are termed positive feedback.

Nervous tissue is composed of two types of cells: ________ that conduct impulses and ________ that surround and protect these cells.

Which one of the following wraps around, supports, and holds organs in proper position within the body?

Which one of the following are structures in the body that are composed of two or more different tissue types joined together to perform a specific function?

The type of muscle responsible for involuntary contractions of the stomach is ________ muscle.

The type of epithelial cells most commonly associated with absorption in the small intestine is ________.

Blood pressure is carefully regulated by a negative feedback control system in the body. When the blood pressure falls below a set point, this decreased pressure is detected by baroreceptors (pressure receptors) in the aorta and carotid arteries. These receptors send signals to a region of the brain known as the medulla oblongata. This region of the brain integrates incoming signals and sends signals to the heart to increase the strength of contractions and to the blood vessels, to constrict arterioles so as to increase the blood pressure, returning it to normal. Based on this information, identify each of the parts of this control system: a) controlled variable b) sensor c) control center d) effector(s)

Cartilage functions well as a cushioning structure because it is composed primarily of collagen fibers in a ground substance with a lot of water.