What are the differences between ectothermic and endothermic organisms?
Endotherms use internally generated heat to maintain body temperature. Their body temperature tends to stay steady regardless of environment. Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment.
Are vertebrates warm or cold blooded?
Vertebrate animals can be either warm-blooded or cold-blooded. A cold-blooded animal cannot maintain a constant body temperature. The temperature of their body is determined by the outside surroundings.
What is a vertebrate quizlet?
Vertebrate. An animal with a backbone. Warm-blooded. Body temperature stays the same even if the outside temperature changes (mammals and birds)
Which animal will be able to control its body temperature the best?
Mammals and birds are called endotherms. An endotherm is an animal that can control its internal body temperature. Endotherms’ body temperature is usually much warmer than the temperature of the environment and usually stays about the same temperature. Endotherms are called “warm-blooded” animals.
How does temperature affect heart rate in ectothermic organisms?
Temperature affects the intrinsic pacemaker rate as well as the relative influence of adrenergic and cholinergic modulation. It also influences the evolved capability to increase HR, with maximal cardiac responses matched to preferred body temperatures in some species.
How do these vertebrate animals differ?
Vertebrates have a skeletal structure with a spinal column or backbone. Invertebrates have no backbone, while vertebrates have a well-developed internal skeleton of cartilage and bone and a highly developed brain that is enclosed by a skull.
Do invertebrates maintain body temperature?
Unlike 34 birds and mammals, which are able to regulate their internal body temperature, invertebrates are 35 poikilothermic ectotherms and their body temperature is highly influenced by, and varies markedly 36 with, the environmental temperature (Speight et al.
What kind of body symmetry do all vertebrates have?
bilateral symmetry
As our bodies develop they mostly display bilateral symmetry across the vertebral column. A new molecular pathway, which plays a role in this symmetry in vertebrates, has recently been discovered.
Which is an example of a vertebrate quizlet?
Both fish and four-limbed animals are vertebrates. DNA analysis shows that fish are tetrapods’ closest relatives. Why have we NOT found examples in the fossil record of every animal that ever lived on Earth?