Question

Squamous epithelium, sperm cells, smooth muscle, or human red blood cells:

1. _____ cell has a flagellum for movement
2. _____ cell have an elongated shape (tapered at each end)
3. _____ cells are close together
4. _____ cells are circular
5. _____ cells are thin and flat, with irregular borders
6. _____ cells are anucleate (without a nucleus)
7. _____ longest cell

Answer 1

The sperm cell has a flagellum for movement, squamous epithelial cells have an elongated shape and are thin and flat with irregular borders, smooth muscle cells are close together, and human red blood cells are circular and anucleate. The sperm cell has the longest structure.

Step-by-step explanation:

The cell that has a flagellum for movement is the sperm cell. Sperm cells have a long, whip-like tail called a flagellum that allows them to swim and move towards the egg.

The cells that have an elongated shape, tapered at each end, are the squamous epithelial cells. They are generally round, flat, and have a slightly irregular shape.

The cells that are close together are the smooth muscle cells. Smooth muscle cells form a continuous layer and are found in the walls of various organs, such as the stomach and intestines.

The circular cells are the human red blood cells. Red blood cells are round, flattened discs that lack a nucleus.

The thin and flat cells, with irregular borders, are also the squamous epithelial cells. They fit together to form a covering or lining and facilitate diffusion in tissues.

The cells that are anucleate, meaning they lack a nucleus, are the human red blood cells. They lose their nucleus during development to create more space for carrying oxygen.

The cell with the longest structure is the sperm cell, specifically its flagellum. The flagellum can be several times longer than the cell itself and helps propel the sperm forward.

Answer 2

1. sperm cells: cell has a flagellum for movement

2. smooth muscle: cells have an elongated shape (tapered at each end)

3. Squamous epithelium: cells are close together

4. Human red blood cells: cells are circular

5. Squamous epithelium cells are thin and flat, with irregular borders

6. Human red blood cells: cells are anucleate (without a nucleus)

7. smooth muscle: longest cell

Step-by-step explanation:

• Sperm cells: Active and morphologically specialized cells. They characterize as having an elliptic head mostly occupied by the nucleus, and a tail of about 55 micrometers that moves impulsed by a motor dynein protein that uses ATP energy.
• Smooth muscle cells: Fusiform cells. Long and tapered at the extremes. Located in organs and viscera, and in vessel walls, where involuntary maintained slow contractions are needed. Although they are the longest cells, their length depends on the organ where they are located. They might reach up to 500 microns.
• Squamous epithelium cells: The wide and length of the cells supere their height. Some of them suffer a process of keratinization from being exposed to dehydration and touch.
• Red blood cells: Red blood cells or erythrocytes are biconcave disks-shaped, with no nucleus, and very small. These are flexible cells that might move along in the smallest capillaries. Hemoglobin provides the typical red color. The red blood cell size and number vary among species.