Question

needs assistance with biology 2

Reflection-6a:Chapter 25 & 26 Name: Chapter 25: Overview of Physiology: 1. Match the following definitions to the terms they describe (Physiology organ/tissue organ system Anafy) An organized collection of one cell type working to carry out a specific function A structure made up of various tissue types working together to carry out a common function A set of cooperating organs that work together to perform a specific function The study of the way a living organism's physical parts function. 2. List the four basic cell types of animals and the names of the corresponding tissues they make up and their functions. Cell Type Corresponding Tissue Type Function of the tissues 3. a. How can an organ be made up of both cells and tissues? b. True/False: Different organs working together for a common function make up an organ system 4. Define the following terms: a HOMEOSTASIS: b. VASOCONSTRICTION: c. VASODILATION d. HYPOTHALAMUS: e FEEDBACK LOOP: 5. Explain how the following processes help maintain a constant body temperature in humans

Answer 1

1.

(a). Tissue

(b). Organ

(c). Organ system

(d). Anatomy

3.

(a). An organ in a broad sense is a compact structure of both cells and tissues. Cells of any organ are considered to be its basic structural and functional unit whereas tissue is the aggregation of similar type of cells. Hence, an organ can consists of different cell types to form tissues in order to make a specific functioning.

(b). True, different organs make up an organ system.

4.

(a) Homeostasis - the ability of an organism to maintain internal stability or internal environment despite fluctuating environmental condition outside.

(b) Vasoconstriction - narrowing of blood vessels due to contraction of it's muscular wall. Mainly found in arteries and arterioles.

(c) Vasodilation - widening of blood vessels due to relaxation of its muscular wall. Found both in arteries and veins.

(d) Hypothalamus - a small part of brain found near the pituitary gland. It controls body temperature, circadian rhythm, hunger , sleep, etc.

(e) Feedback loop - a biological phenomenon in which the output of a system either amplifies the system for positive feedback or inhibits the system for negative feedback. It helps in maintaining of homeostasis.