Cardiac muscleA) does not respond to nervous stimulation.B) contracts slowly when it is stimulated.C) cannot stay contracted.D) is the same as skeletal muscle.24. Skeletal muscle contractions are under the control ofA) exocrine glands.B) the endocrine system.C) the endocrine and exocrine systems.D) the nervous system.25. Hormones:A. occur naturally in the bodyB. can be harmful in a state of unbalanceC. are secreted by endocrine glandsD. all of these26. The endocrine system:A. releases chemicals into the bloodstream for distributionthroughout the bodyB. Releases hormones that alter the metabolic activities ofmany different tissues and organsC. produces effects that can last for hours, days, or even longerD. can alter gene activity of cellsE. all of the above27. Anatomy is a term, which means the study of _____.A) physiologyB) morphologyC) cell functionsD) human functions28. The study dealing with the explanations of how an organworks would be an example ofA) anatomyB) cytologyC) teleologyD) physiology29. The exchanging of gases for the purpose of producing energyis called _____.A) breathingB) respirationC) circulationD) responsiveness