A & P Chapter 4 Hmwk

What do the glands shown in A and B both have in common? Both are endocrine glands Both are exocrine glands Both are sebaceous glands Both are unicellular

Both are exocrine glands Both glands secrete substances onto body surfaces or into body cavities.

Which tissues have little to no functional regenerative capacity? epithelial tissue, bones, and areolar connective tissue cardiac muscle and nervous tissue in the brain and spinal cord cardiac and smooth muscle nervous tissue and smooth muscle

Cardiac muscle and nervous tissue in the brain and spinal cord Cardiac muscle and the nervous tissue in the brain and spinal cord have virtually no functional regenerative capacity, and they are routinely replaced by scar tissue.

Drag the appropriate labels to their respective targets. Label the membranes: Cutaneous, Mucous, Serous

Cutaneous membrane Mucous membrane Serous membrane

After a heart attack, fibrosis occurs at the site of cardiac muscle cell death. This reduces the efficiency of the heart's pumping activity because __________. the undamaged cardiac muscle cells become fatigued from the energy expended during the healing process fibrous connective tissue is incapable of contracting fibrosis produces new cardiac muscle cells that are not as strong as the mature ones that died the initial death of some cardiac muscle cells triggers a chain reaction in which progressively more and more neighboring healthy cells die

Fibrous connective tissue is incapable of contracting Cardiac muscle contains sarcomeres, which allow for the tissue to contract when electrically stimulated. Fibrous connective tissue lacks these special contractile units.

Marfan's syndrome is a disease associated with faulty manufacture of the extracellular protein fibrillin. Since this is a component of elastin, in which of the numbered cells would the damaged gene be expressed?

Number 2 Cell 2 is a fibroblast, which is the primary producer of the major fibers, including elastin and fibrillin, in connective tissue proper. It can be identified by its numerous cell extensions.

In connective tissue, the role of elastic fibers is to __________. Retain fluid Provide tensile strength Provide flexibility Form delicate networks around blood vessels

Provide flexibility Elastic fibers contain elastin, a rubberlike protein that allows them to stretch and recoil like rubber bands, making them very flexible.

Injured cartilage might heal more quickly if a treatment were discovered that would __________. prevent chondrocytes from dividing and thereby reducing the relative amount of matrix that is present in the cartilage stimulate blood vessels to develop within cartilage stimulate calcification of cartilage All of the listed responses are correct.

Stimulate blood vessels to develop within cartilage Cartilage is normally avascular, so nutrients required for healing must diffuse from distant blood vessels, which delays the healing process.

Why are adipose tissue, blood, and bone all considered to be connective tissues? They all have the same types of cells They have a common origin: Mesenchyme They connect to each other They all have collagen and elastic fibers in their extracellular matrix

They have a common origin: Mesenchyme Adipose tissue, bone, and blood (like all connective tissues) are derived from mesenchyme, an embryonic tissue. Also common to all connective tissues is the presence of cells and an extracellular matrix that consists of fibers bathed in ground substance.

Which of the following characteristics is lacking in the typical areolar connective tissue pictured in the figure? Vascularity Elastic properties Ability to support other tissues Ground substance None of these characteristics is lacking

This tissue has all of these abilities.