BMS CH. 1 QUIZ

Which statements apply to homeostatic imbalances. 1. They many be caused by aging. 2. They often lead to disease. 3. Negative and/or positive feedback processes are not functioning properly. 4. Medication that targets an imbalance in one organ may alter homeostasis in other organs.

1, 2, 3, 4

When blood pressure is elevated, the body employs negative feedback loops to maintain homeostasis. What options are an appropriate response by the body? 1. Heart rate is decreased, which will decrease blood pressure. 2. Contractility of the heart is increased, which will increase blood pressure. 3. Blood vessel diameter is decreased, which will increase blood pressure. 4. The kidneys will help increase blood volume, which will increase blood pressure.

1.

5 steps of homeostatic control mechanism

1. stimulus 2. receptors 3. control center 4. effector 5. homeostasis restored

What statements apply to positive feedback. 1. The effector drives the variable back to a set point. 2. A change is amplified, driving the body away from homeostasis. 3. Homeostasis is maintained by the effector opposing a change in the variable. 4. The change in a variable is increased until a climatic event occurs.

2, 4

Neutrons, protons, and electrons make up ____, the smallest particles with unique chemical properties.

atoms

The smallest unit of life, ____ are comprised of multiple organelles and macromolecules.

cells

If your body temperature increased to 105 degrees Fahrenheit, you would try to ______ temperature.

decrease

When maintaining a stable internal environment, if blood pressure increased to 130 mm Hg, your body would _____ blood pressure.

decrease

Characterized by both differentiation and growth, ______ explains increased size and functional complexity.

development

Species of life will all demonstrate _____ over time as a result of gene mutations and rate of success with the environment.

evolution

Physiology is the study of _____ of body parts. To do this, physiologists focus on the molecular and/or ______ levels to gain complete understanding of the system's workings. Thus, a basic knowledge of ______ is essential in understanding physiology.

function; cellular; chemistry

Living things must be able to maintain a relative _____ or set of stable internal conditions.

homeostasis

If heart rate decreased to 40 beats per minute, your body would ____ heart rate.

increase

If oxygen levels in the blood decreases to 75 mm Hg, your body would _____ breathing.

increase

Gross anatomy, also called ______ anatomy, examines parts that are visible to the unaided eye.

macroscopic

The ability to bring in nutrients, produce energy, build necessary components, and eliminate waste products is _____.

metabolism

In ______ anatomy; structures that cannot be seen with the naked eye are examined.

microscopic

Two or more atoms make up a _____.

molecule

Most homeostatic regulations occur through ____ feedback.

negative

In all these examples, the changes which occurred in the body would be fatal if they continued. The body would have to respond or a change in the _____ direction to help maintain a stable internal environment.

opposite

In _____ _______ several organs work together to carry out a similar function.

organ systems

Molecules form together to make _____, much larger complexes like mitochondria, lysosomes, and centrioles.

organelles

A complete, single ______ represents the largest division of hierarchical organization.

organism

All living things exhibit _____ or complexity far greater than their inanimate surroundings.

organization

Multiple different tissue types together are called ____ and likewise work together to perform similar actions.

organs

The branch of anatomy that examines all anatomic changes resulting from disease is ____ anatomy.

pathologic

Homeostasis is a term that describes the many ____ processes to maintain the ____ of the body. These characteristics are noted about homeostatic systems 1. They are _____ and continually change. 2. The control center is generally the nervous system or ____ system. 3. There are three components: receptor, control center, and _____. 4. They are typically regulated through ____ feedback to maintain a normal value. 5. It is when these systems fail that a homeostatic imbalance or ____occurs, threatening an individual's survivor.

physiologic, health 1. dynamic 2. endocrine 3. effector 4. negative 5. disease

Investigation of relationships among internal structures using scanning procedures in _____ anatomy.

radiographic

The ability to make additional copies of themselves describes the necessary life characteristic of ______.

reproduction

All living things must also be able to interact with their respective environments and thus said to display _______.

responsiveness

Anatomy is the study of form and ______.

structure

Collections of like cells performing a similar function, _____ are divided into four major categories.

tissues