The Human Body: An Orientation

1. Gross anatomy is the study of body structures too small to be seen with the naked eye. body structures that are large and easily observable. body structures belonging to the intestinal tract. body structures that are really disgusting. b.

Gross anatomy is the study of structures that are easily observable; microscopic anatomy is the study of structures too small to be seen with the unaided eye.

2. The integumentary system is the body’s fast-acting control center. responsible for producing hormones. responsible for returning fluid to the circulatory system. the external covering of the body. d.

The integumentary system is the skin The integumentary system is the skin. Hormones are produced by the endocrine system, and the lymphatic system is responsible for returning fluid to the circulatory system.

3. Hematopoiesis occurs in the _______ system. endocrine integumentary skeletal cardiovascular c.

Hematopoiesis, the formation of blood cells, occurs in long bones.

4. Once a stimulus is received by a receptor, it approaches the control center by a(n) afferent pathway. efferent pathway. motor pathway. reflex pathway. a.

The afferent pathways take impulses from the receptor to the control center. Efferent pathways take the message from the control center to the effector.

5. True or false? Most often, homeostasis is maintained by positive feedback. b. False.

Most often, negative feedback controls homeostasis Most often, negative feedback controls homeostasis. For example, if one overheats, the body releases heat through perspiration to cool itself.

6. In the anatomical position, the body is lying face up. lying face down. erect with feet parallel and arms hanging at the sides with palms forward. erect with feet parallel and arms hanging at the sides with palms facing backwards. c.

In the anatomical position, the body is erect, palms are forward, and thumbs are lateral to the body.

7. The antebrachial region would be found on the skull. arm. leg. ankle. b.

The antebrachial region is on the anterior side of the arm at the elbow. IVs are administered in this region.

8. Pituitary, thyroid, and adrenal are all part of the______ system. Cardiovascular Endocrine Urinary reproductive

They are all part of the endocrine system.

9. Keeping internal conditions stable while outside conditions change is known as: Hematopoeisis Diffusion Osmosis Homeostasis

homeostasis

10. An example of positive feedback is: Giving birth Body temperature Concentration of body fluids Heart rate Blood pressure

Giving birth. All others are negative feedback.

11. The wrist is _____ to the hand Proximal Distal Superior inferior

Proximal. The hand is distal to the wrist.

12. A ______ section is cut along a horizontal plane, also known as a cross section. Sagittal Coronal Frontal Transverse

Transverse plane is the horizontal plane in humans Transverse plane is the horizontal plane in humans. It is vertical in other bilateral animals.

13. The thoracic cavity is divided into: Pleural and cardiac cavities Abdominal and pelvic cavities Pleural and pelvic cavities It is not divided at all

Pleural (lung) and pericardial (heart) cavities make up the thoracic cavity.