The __ is the tube that connects the middle ear and the throat. stapes cochlea external auditory canal eustachian

The skin contains a compound that is converted to __ when the skin is exposed to ultraviolet rays from the sun. vitamin A vitamin E vitamin C vitamin D

The pigment that occurs in the epidermis and absorbs light energy is __ melanocyte melatonin melanoma melanin

What is the anatomy of a spermatozoon? Select 2 correct answer(s) The head contains mitochondria for energy production. The acrosome cap contains a lubricant. The midpiece contains ribosomes. There are 23 chromosomes in the acrosome cap. The tail has cilia for movement

The following sequence of DNA is part of a gene. How many amino acids are coded for by this segment? 5' ATCAGCGCTGGC 3' 4 8 12 20

The medulla of a lymph node contains __ lymphocytes and macrophages. A B B NK C cytotoxic T D cordal E medullary

If the human body were a car, glucose would be: The engine The wheels The gasoline The motor oil

5. Describe what hormones do. Infer why they attach to a cell's membrane.

1. What two structures on the microscope will you use to focus on your specimen? __ 2. Why should you never use the coarse adjustment knob on high power? __ 3. When do you use the fine adjustment knob? __ 4. Our microscopes have three objectives. What are their powers? __ 5. What is the magnification of the ocular lens? __ 6. What is the shortest objective called? __ 7. How do you switch objectives? __ 8. Which structure controls how much light passes through the specimen? __ 9. How should you carry the microscope? __ 10. How can you prevent your slide from slipping on the stage? __

When free-floating antibodies block the binding sites of invaders, this is called... __ Neutralization Killing Cancellation Immobilization

Hot Questions

Select the correct answer. Which of the following phrases best explains the role of a habitat? A. provides interactions with other organisms B. provides water C. provides a place to reproduce D. provides a place to live

Which type of membrane protein moves sodium and potassium through the nerve cell membrane? Junction protein Transport protein Receptor protein Channel protein Enzymatic protein Cell recognition protein

Multiple Select Question Select all that apply Choose all that result from contraction of the lateral muscle of the thigh. abduction of the thigh lateral rotation of the thigh extension of the thigh adduction of the thigh medial rotation of the thigh

Match the Process to the Pool Movement Carbon Moves From -To __ Atmosphere __ __ Bioshpere __ __ __ __ __ Process Photosynthesis Respiration Decomposition Fossil Fuel Combustion __ __

The kidney is associated with which system? A. Endocrine system B. Cardiovascular system C. Skeletal system D. Respiratory system E. Nervous system

What is the direct effect of: Decreased ADH Only CO increases Only CO decreases Only BP increases Only BP decreases Both CO and BP increase Both CO and BP decrease

What are the four phases of a typical bacterial growth curve in order? Exponential, Lag, Death Stationary Lag, Exponential, Stationary, Death Death, Lag, Exponentlal, Stationary $Lag,$ Stationary, Death,Exponential

8. Oxygenated blood from the lungs enters the heart at the: a. left ventricle b. right ventricle c. left atrium d. right atrium

Bacteria that grow optimally at pH levels below 5 are classified as: Neutrophiles Alkaliphiles Acidophiles Halophiles

Which group of bacteria can survive and grow at temperatures below $15^{\circ }C$ Thermophiles Psychrophiles Mesophiles Hyperthermophiles